From: Andreas Zwinkau <zwinkau@kit.edu>
Date: Wed, 16 Mar 2011 14:19:31 +0000 (+0100)
Subject: Adding some comments to ifconv.c
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=7819c9ad09c193d2855404dc1e24c4e84f91846d;p=libfirm

Adding some comments to ifconv.c
---

diff --git a/ir/opt/ifconv.c b/ir/opt/ifconv.c
index b5c453e32..0d1307a9a 100644
--- a/ir/opt/ifconv.c
+++ b/ir/opt/ifconv.c
@@ -348,6 +348,7 @@ restart:
 					cond, projx0, projx1
 				));
 
+				/* remove critical edges */
 				env->changed = true;
 				prepare_path(block, i, dependency);
 				prepare_path(block, j, dependency);
@@ -355,7 +356,7 @@ restart:
 
 				mux_block = get_nodes_block(cond);
 				cond_dbg = get_irn_dbg_info(cond);
-				do {
+				do { /* generate Mux nodes in mux_block for Phis in block */
 					ir_node* val_i = get_irn_n(phi, i);
 					ir_node* val_j = get_irn_n(phi, j);
 					ir_node* mux;
@@ -393,6 +394,7 @@ restart:
 					phi = next_phi;
 				} while (phi != NULL);
 
+				/* move mux operands into mux_block */
 				exchange(get_nodes_block(get_irn_n(block, i)), mux_block);
 				exchange(get_nodes_block(get_irn_n(block, j)), mux_block);